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Started by SilverGreen93, 11:05, 19 September 17
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Quote from: rpalmer on 12:34, 19 September 17Silvergreen93,Where did you get the NEC765 disc controller IC or are you using a FPGA (or similar) to emulate the 765?rpalmer
Quote from: Bryce on 11:49, 19 September 171 - No, a PC 3.5in drive doesn't output a "Ready" signal, so the drive needs to be modded to do this.3 - This is the tricky part and you will have to decide how you get around this one. The DDI-1 actually gets its power from the FD-1 Floppy drive, not from the CPC.
Quote from: SilverGreen93 on 11:05, 19 September 175. What are LK1, LK2, LK3 jumpers for?
Quote from: Bryce on 11:49, 19 September 171 - No, a PC 3.5in drive doesn't output a "Ready" signal, so the drive needs to be modded to do this. Also, PC drives are hardwired as DS1, meaning that they are drive B:, this also needs to be modified.
Quote from: Bryce on 11:13, 14 November 17It's very tall and will block the screen for many users. You should spread the design horizontally like the original DDI so that it's not blocking your view.
Quote from: Bryce on 11:35, 14 November 17Many users still use an original CTM Monitor which has 8cm power cables to/from the CPC, so putting the monitor higher/further away isn't an option.
Quote from: SilverGreen93 on 11:38, 14 November 17I see. I didn't know that, I haven't had the original monitor, but it sounds like the CRT is dangerously close to the eyes.
Quote from: SilverGreen93 on 11:20, 14 November 17Anyway, I'll try to make another design with the ROM underneath the edge connector to lower the overall position, because extending the design over 10cm will cost a lot more to produce.
Quote from: khaz on 13:52, 14 November 17- You may want to add a jumper / switch to short pins 31-32 to access the other side of the drive.
Quote from: SilverGreen93 on 13:59, 14 November 17The disks are not double sided on the original DDI-1? Do I need to add a jumper to switch sides?I see that an output signal /SIDE1 exists and is driven directly by the uPD765...[/font]
Quote from: Bryce on 14:04, 14 November 17Moving the PCB to the other end of the cable (at the drive end) won't work. The expansion port signals aren't buffered and are too weak to drive a signal down a meter of cable. They are also much more likely to damage the CPC through static discharge - Long plastic cable connected directly to CPU pins = bad idea. The DDI-1 has buffered outputs to allow the cable to the drive to be that long.
Quote from: khaz on 14:11, 14 November 17Parados, and other custom DOS can access both sides directly, but only for floppies formatted for it (like ROMDOS format or games with a custom DOS like Orion Prime). If you try to put two standard DATA dsk images on your 3.5, you will only be able to access one.
Quote from: Bryce on 14:21, 14 November 17Edit: It's not a simple "jumper to ground". Here's how it has to be connected: http://www.cpcwiki.eu/index.php/Side_Select_Switch
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